Yarn spool for tube frames



Aug. 21, 1928.

E. F. HATHWAY ET AL YARN SPOOL FOR T-UBE FRAMES Filed Nov. 5, -182e;

/ (f4/? Ja INV N TORS Patented Aug. 21, 1928.

UNITED STATES PATENT oFFlcE.

EDGAR F. HATHAWAY, OF WELLESLEY, AND WALTER BIXBY, OF BOSTON, MASSACHU- SETTS, ASSIGNOR-S TO SHAXVBIUT ENGINEERING COMPANY, OF BOSTON, MASSACHU- SETTS, A CORPORATION OF MASSACHUSETTS.

YARN SPOOL FOR TUBE FRAMES.

- Application filed November 5, 1926.

This invention relates to yarn spools and more particularly to the type of yarn-spools used in tube frames for weaving Axmin'ster carpets, although the construction is applicai ble to other forms of yarn spools.

Heretofore it has been proposed to construct yarn-spools with end gudgeons having their inner ends reduced and threaded so as to be screwed into the wood of the spool barrel or into an inserted block or plug, the gudgeon then being locked against rotation by a transverse locking pin passing through both the gudgeon and the spool-barrel, but this construction, being subjected to continnous jarring,besides to shrinkage of the wood, allows the pin to work loose and shift out of place and drop out so that it interferes with proper winding on the yarn and ultimately ceases to function by dropping out, and thus allows the gudgeon itself to work loose and become unserviceable. Y

Furthermore, a spool filled or partly filled with yarn can not Lbe supplied with .a new gudgeon or with a new anchoring pin, in case of loss of one or both of these elements by working loose and dropping out, without removing` the yarn from the spool an operationv which, for practical reasons, is prohibitive.

The present invention overcomes these and other troubles by providing a positive anchoring construction by which the accidental removal of the locking pin is prevented, while at the same time affording adurable and reliable threading engagement between the spool and the gudgeon, not affected by the shrinkage of wood or by the weakness of threads cut in the wood. Moreover, the gudgeon may be readily removedvor replaced without any disturbance `of the yarn wound on the spool since the transverse locking member or pin is held permanently in place but does not yield to penetrate the gudgeon, while the gudgeon, when screwed home, locks itself and also4 locks the anchoring pin-against displacement. The construction also readily permits the use of two journals of different diameter on each end of the spool to fit, respectively, the small bearing in the end bracle ets of the tube frames, or the larger bearings v in the intermediate brackets of the tube f frames and allows an interlocking construction for the adjacent ends of two axially speels a multiple spool tubeframe- Serial No. 146,425.

These and other features of the invention will be described in the following specifica-V tion and will be defined in the claims hereto construction and arrangement embodying the principles of this invention, in which:

Figure 1 is a front elevation of the adjacent ends of two inter-locked spools with the intermediate bearing bracket or stand shown in sect-ion.

Figure 2 is an enlarged view ofthe end portion of a spool showing our improved gudgeon construction.

Figure 3 is a view somewhat similar to Figure 2, with the addition of a clamp-retaining memberto the regular,journal-gudgeon construction. Y Y

' Figure 4 is an end view of the construction shown in Figure 3. A

In the practice of this invention, as illus trated in the drawings, we employ a cylindrical spool-barrel l, provided at its ends with an axial bore la. For strength a metal ferrule 2 is secured snugly on the end of the barrel so as to project somewhat beyond the end to receive the hub or counter-sunk portion 3, of the metallic head 3, the center of which hub is perforated or bored in alignment with bore l of the barrel.

At the inner end of this bore l is inserted an anchoring member in the form of an internally'threaded bushing 4, fitting snugly into .the bore, and having diametrically opposite holes registering with a transverse hole through the barrel to receive a transverse lockingpin 5, which holds the bushing 4 against rotation and against axial displacement. The locking pin is transversely concaved, for a purpose presently to be described.

The journal-gudgeon has its intermediate portion fitting snugly into the bore la of the barrel and its inner end is reduced and threaded to form threaded engagement with the threads on the interior of the bushing 4. The inner end of the gudgeon is preferably convex and is arranged to engage or seat in the concavity formed at the medial portion ofthe locking pin 5. The outer end 6b of the j ournal-gudgeon 6 is preferably of polygonal form, in this case being hexagonal in contour, and. 'terms a shoulder engaging' the transf verse portion ot the hub 3 so as to draw the hub and its head tightly against the end oi the spool and hold it there. The outer end of this hexagonal head 6b is provided with symmetrical notches 6, extending inward axially for a suiiicient distance to form three projecting teeth or prongs 6d intervening between the notches. The notches and the teeth are of the same arcuate Adin'iensions so that they may interlock in different circumferential relations with a similar gudgeon carried by the adjacent end ot the companion spoolof ythe tube-frame. Y

` In the form shown, the gudgeon itself is axially bored to receive a shouldered springplnnger 8 which is normally pressed outward by a helical spring 9, seated in the axial bore of the gudgeon, said plunger being prevented from escaping trom the bore by means of inwardly upset or swaged lips Gf, formed by upsetting the inner edge portions ot the teeth 6d.

Surrounding the hexagonal end of the gudgeon is a larger ournal member 7, formed of cylindrical tubing, provided at its inner end with tongues lwhich are passed through registering holes in the hub 3 of the head ,and swaged down or clinched thereon.

It will, therefore, be seen that the gudgeon holds the head in 4place and thus maintains vin position two coaxial or coneent-ric'journal members `7 and 8, one adapted to tit the klarge bearing in the intermediate stand or bracket of the tube frame, while the other is of small enough diameter to tit the small bearing opening inthe end bracket of the tube-trame. Since the .smaller bearing is in the form of a yielding pintle does not interfere with bringing two adjacent spool ends together into interlocked relationship, as shown in Figure l, while at the same time the pint-le is'available vfor use in the end bearing if it be desired to reverse the spool in order to reverse the pattern.

By means of a. spanner wrench engaging the end notches in the gudgeon, or of an ordinary Spanner wrench engaging the hexagonal head, the gudgeon can be screwed home so that its inner end 6a will not only engage the concaved portion .of the locking pin, but will bind against it so firmly that the thrust acts in precisely the same way as does a lock or jamb nut to bind the thread against unscrewing.` Instead of using a locking pin annu- 'lar'ly grooved at .its middle portion, as shown at 5a, we may use a straight pin as shown 1n Figure 3, .and 1n that .case the 0` udgeon l is screwed .home with suiicient force 4to bow or buckle the middle portion, engaged bythe end of the gudgeon,'into concave form so that the pin thus concaved or buckled 'is positively locked against displacement or working loose, while at the same time the thrust of the pin against the end of the .gudgeon serves to lock the gudgeon against accidental unscrewing.

In Figure 3 we have shown an additional element 1n order to provide means for attaching the clamp-retaining springs, such means `comprisinor an annular hub or ring l0 having projecting prongs or hooks l0, to whose flat face is swaged the tongues of the larger bearing ournal 7 the inner edge around the central oriiice oi" this hub being engaged by the shoulder of the gudgeon 6 so that both the clamp-attaching member and the hub of the head are pressed firmly against the end oli the spool when the gudgeon is screwed home to locking position. Except 'for this clamp-attaching member and the use of a bowed pin instead of an annular-ly grooved pin, the construction is the same as that illustrated in Figure 2.

It will be seen, therefore, that the gudgeon locks itselt` in place beside positively locking,

against displacement, the pin that secures lthe anchoring member or bushing 4c in place, yetV at the same time the gudgeon is very easily removed and replaced without disturbing the yarn on the spool. There is no possibility ot the locking pin working out to'interfere with the yarn, or dropping outso as to permit the working loose of the gudgeon.

What we claim is: l

l. A arn spool for a tube trame or the like, em racing in combination a Spool-barrel having an axial bore inv its end, a threaded bushing anchored in said bore by a transverse locking pin, a journal gudgeon having threaded engagement with said bushing and arranged, when screwed home, to form an inv terlocking engagement with the transverse pin to lock the pin against displacement transversely of the spool, and acting by the thrust against saidpin vto lock itself against unscrewing.

l2. In a yarn spool, the combination with an axially bored `spool barrel, an anchoring bushing in said bore, a transverse locking pin passed through said bushing and a journal gudgeon, said gudgeon and said pin being releasably interlocked to hold said pin and said llo gudgeon against accidental removal, while Y permitting removal of the gudgeon without removing the pin.

3. In a yarn spool, the combination with an axially bored spool barrel, an anchoring member inserted therein, a transverse locking pin, a journal gudgeon projecting into said .bore and 4having its inner end engaging a concaved .middle portion of said locking pin to .prevent wit-hdrawalof the pin, said gudgeon having an exterior shoulder adapted to engage and hold the interposed portion of a spool-head :against the end ot the spool.

.1. In a yarn spool, the combination with a spool barrel having an axially bored `,end to receive a journal .gudgeom gudgeonanchoring means located and locked inside said bore, an axial journal gudgeon having releasable threaded engagement with saidV anchorlll? ing means and acting, when screwed home, to anchor both itself and its anchoring means from Working loose.

5. In a yarn spool, the combination with a barrel having an axial end bore, gudgeonretaining means secured therein, a self-locking journal-gudgeon releasably engaged With its retaining means, the outer end of said gudgeon being provided With two concentric bearing journals of diierent diameter, arranged one inside of the other, the inner one being retractible under endWise pressure.

6. In a yarn spool, the combination With a spool-barrel having an axial bore in its end, an internally threaded bushing inserted in said bore, a transverse locking pin passed through said barrel and said bushing, an axial gudgeon having an inwardly projecting extension having threaded engagement with said bushing and arranged to engage a concaved portion of the looking pin When screwed home, the outer end of said gudgeon containing a spring-pressed pintle .adapted to form a retractile journal, and being formed to hold a spool-head firmly against the end of the spool.

In Witness whereof, We have subscribed the above specification.

EDGAR F. HATHA'WAY.

WALTER BIXBY. 

